30143221 has 4 divisors (see below), whose sum is σ = 30221100. Its totient is φ = 30065344.

The previous prime is 30143207. The next prime is 30143237. The reversal of 30143221 is 12234103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12234103 = 7 ⋅1747729.

It can be written as a sum of positive squares in 2 ways, for example, as 2842596 + 27300625 = 1686^2 + 5225^2 .

It is a cyclic number.

It is not a de Polignac number, because 30143221 - 2⁵ = 30143189 is a prime.

It is a super-2 number, since 2×30143221² = 1817227544509682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30143195 and 30143204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30143021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38356 + ... + 39133.

It is an arithmetic number, because the mean of its divisors is an integer number (7555275).

Almost surely, 2^30143221 is an apocalyptic number.

It is an amenable number.

30143221 is a deficient number, since it is larger than the sum of its proper divisors (77879).

30143221 is an equidigital number, since it uses as much as digits as its factorization.

30143221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77878.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 30143221 is about 5490.2842367222. The cubic root of 30143221 is about 311.2169335259.

Adding to 30143221 its reverse (12234103), we get a palindrome (42377324).

The spelling of 30143221 in words is "thirty million, one hundred forty-three thousand, two hundred twenty-one".